"Peter Dohm" wrote

It is not hard to believe at all--except for the proposition that either
trick (gate open or gate closed) works on all trucks at all speeds.

Trucks are not that different. Except for something like the old El Camino, thy
are mostly boxes on wheels, to the wind.

Sure, they have a small styling curve here and there, but most of them are
square chopped off behind the cab, and have tailgates about the same height.
--
Jim in NC